Pressure cooker



July 12, 1927.

s. s. GRAVES PRESSURE COOKER Filed June 2, 192a $0077 5 GRAVES.

attouwq Patented July 12, 1927.

scorn s. ennvnsor sen eneq mrbsmy p h Pen-seven cooKER;

Application filed June 2,

My invention relates to steam pressure cookers for'lntchen or similar use, and the ohyects of my "invent on are: first, to pro vide a cooker of this class in which the cover. can be eas ly and quickly removed fromcr secured to the vessel; second to provide a cooker of this class in which the cover isfresiliently held'in engagen aent with the top of the vessel; third, to provide a cooker of-thls "class onwhich no safety or hlow-out valve or no'petcocl: is required, but in whichthe excess pressure is relieved orsteam is re- 1 leased by the cover being Sllfi'hlil}? raised from" .the'vessel as the pressure ofthe steain is-increased hevo'nd a certain predetermined hi h mark or by manually operated 'rn'e'ans; thus p'ermittin e steam to' escape; fourth to provide novel resilient means for securJr- 'the icove'rto the vesselrfifth, to provide x hole a novellv constructed sterrn pressure cooker,

and-sixth, to'provide a coolrer ofthis class whlch isvery. simple and economifcalozt con-' structiong durahle; reliable and which-will ,,not readily deteriorate or get-out of order.

5 With these and other ohiects in' viewfas" will appear hereinafter; 'my invention conslsts ot 'certaln novel 'features ct construetion.,cornhination andarrane'ementotfi' ,oarts and portionsas will-hehereina'tter described in detail and particularly set forth ln'thel to the" appended claims, referencehein v accompanying drawings and to 1 ters of reference thereon, wl. ch fans a part of this application, in which: v

' Figure 1 is a sectional elevational viewof my steam cookelz taken through i ct 2. showing by dotted lines certainshifted positions' 'of the cover securi'nrr niemhersrtor' securing ,the cover 'in positionor releasing the saine; Fig. 2 is an elevational view l' hereof,'taken ate right ank'rle to that [of F7 15" and' Figr. 3 is a plan view of my coolzerl.

Like characters or; reference refer to r siniisev wardl z considerable distanoe it'rom the bots tom or the channel orth'e-top rim ofthe ves 192s. seriairnof'cra'issp I 'fronione to ten pounds-0f steam. The vessel '1 1s made sufficiently large to receive secondary containers in which food is adapted to he placed forcooking or for steaming.

Thecove r flis provided with an annular,

'downwardly extending flange 2 which is provided with'anannular channel 2 onits under side. It will he inot-e'd'that theflouterf portion 2 0i the' flange" 2 extends downsel, which is'adaptedto he positionedtheree ann'nlar nel 2 lof said cover is provided a gasl e BiInadef fah'rlc and afsuitable plas'ti composition applied .inl the" fabric; Fl-She vesselis provided at its outer sid'eand' in, and serves to prevent the lid 'from'shift-f ingwhen lifted by excessive pressure and al- 7 so as a'gruide' to turn escaping steam down-.-

'ward'l' g alonothe side ofthevessel." In the; v

near its upper end with outwardly extending V lugs 1 with ,reduced outer ends, the inner ends" being: secured toi-t-he yivesseh forming shon'lders'forf'the eXtendedfends: On two of said lugs 1 diametrically o'pposite each I other,-1s plv'ota'llv lnount'edithe handle mam:

loe'r4 made or relatively heavy rod, with enilarged portions l at itsl'pivoted ends, bentin' z ub stantially a L -shape withtllefsides of the U extending diagonally" towards the middle portion, which is providedwith spaced. apart shoulders crflangejes 4 oetween which is adapted to he positioned "the head member'G; :5

Another handle orfhandle positioning mend her '5 also" me or'frelativelyhe'avy rod,v with an enlargediower'end 5%, when in position on" the cooke similarly placed with its, enlarged lower end 1'5? re'rncvalilv positioned 'on'ethird-lu-Q 1"? on "the vessel intermediate other @011 1-11'e Qnpper end offsaid' handle pos'itio nlngr member is 'securedwthe 'vided intermediate itsends and on its upper side wltli a transverse slot 6, 1n whlch 1s adapted to be positioned the portion of the head member 6; Seidhead member is pro handle lnemher "between the V annular flanges. {)n the end of the head member 6,

tioned the screw 7,- whichextends downwardly therefrom and is provided at 1ts lower end withahallsoclreti' 1n WhlCll 1s positioned ajvhallportion 8 at the upper'end er the compression springmernher 8. Said I spring "member is ofiset laterally-internis diate its ends'in theshape of a bow andforlns opposite the memherfi, is adjiustably 'posi an 7 efficient spring of slight longitudinal displacement when compressive force is appliedjat its ends.

Said compression member is adapted to b The other or lower end of positioned in a recess 2 provided in the upperend of the centrally positioned lug 2 in the cover 2, all substantially as shown in the drawings The adjusting screw 7 is provided with an outwardly extending lever or handle 9 for adjusting the compression of v the member 8 to regulate the pressure of the steam in the cooker. The handle 9 is of such a size that a great force cannot be exerted v. on the compression member.

The pressure gage '10 may be secured in the cover 2 to com municate with the interiorofjthe cooker to 7} indicate the-steam pressure therein. It will be noted that upward pressure on the screw 7 causes pressure. downwardly and inwardly ;'0Il tl1e member 5 and holds the portion '5 on the lugs l -without other fastening means and with increasing security as the pressure I in .the vessel increases.

'It will also-be noted that as steam is 7 generated in the 'cooker greater than the compression of the spring" member against 7 p the cover, the cover will be raised periodi- 'cally to relieve the-excess steam generated in the cooker. and thus prevent danger from explosion. I v o 7 Though I have shown and described a particular construction, combination and arrangement of parts and portions, I do not wish to "be limited to this particular con- "mtruction, combination-and arrangement, but 'desire to include in the scope of myinvention the construction, combination and ar-' rangement substantially asset forth in the appended claims.

It is obvious from this construction, that thereis provided a steam pressure cooker in i which the cover can be easily and quickly removed from or secured tothe vessel; that there is provided a cooker of this'class in which the cover is resiliently clamped to the. vessel or container; that there is provided a cooker of this classin which the usual safety or blow-off valve, provided on cookers of this class, iseliminated, and that, also the usual pet-cock is eliminated, its

function being included in the lidreleasing lever 9 and its attachments; that, there is provided acooker in which the excessive pressure 0f the steam is relieved or the steam is released by reason of the cover bemg raised from the vessel as the pressure of the steam is increased beyond a certain predetermined high mark; that there is provided novel resilient means forsecuring the cover to the vessel, and as a whole, a novelly constructed cooker, and that there is provideda -cooker, of this class which is very simple and economical of construction, durable, reliable, and which will not readily deteriorate or getout of order.

pression. adjusting means provided at one end of said resilient compression member.

2. A pressure cooker, including a con' tainer, a cover for said container, a handle member secured to said container and extending upwardly therefrom, and a bow-,

shaped resilient compression member positioned with ts lower end 1n a recess in sa d portion of said handle member. Y i 1 Having thus described my invention what 7 cover and-its upper end adjacent the middle '8 V 3.A pressure cooker, including a container, a cover for said container,,a handle member secured to said containerand extending upwardlytherefrom, a bow-shaped resilient compression member. positioned with its lower end in a recessin said cover V and its upper end adjacent the middle portion of said handle member, 'and compression adjusting means provided atone end of said compression member.

4. A pressure cooker, lncluding a con-' tainer, a cover for said container, a handle member secured to said container and ex tendingv upwardly therefrom, a resilient compression member pivotally. mounted at its upper end contiguous to the middle por-' ion tion of said handle member and positioned and a compression adjusting screw means provided in connection with said resilient compression member.

in a recess in said cover at its lower end,

5. A cooker, including'a vessel, a cover for said vessel, a handle member pivotally mounted at the upper end of said vessel and adapted to extend over said cover, a handle positioning member detachably secured to said vessel intermediate the pivotal mountings ,of said'handle member thereon, said handle positioning member being provided at its upper end with a transverse handle positioning slot in which the upper portion of said handle member is adapted to be. positioned, and a resilient compression member positioned between the upper end of said handle positioning member and said cover. 6. A cooker, lncludlng a vessel, a cover for said vessel, .a handle member piv'otally mounted at the upper end of said vessel and 7 adapted to extend over said cover, ahandle positioning member detachably secured to said vessel intermediate the pivotal mount- 'ings of said handle member thereon, said handle positioning member being provided at its upper end with a transverse handle positioning slot in which the upper portion of said handle memberis adapted to be positioned, a resilient compression member posi= tioned between the upper end of said handle positioning member and said cover, and a compression adjusting means in connection With said resilient compression member.

7. A cooker, including a vesseha cover for said vessel, a handle member pivotally mounted at the upper end ofsaid vessel and adapted to extend over said cover, a handle positioning member detachably secured to said vessel intermediate the pivotal mountings of said handle member thereon, sa1d handle positioning member being provided at its upper end'with a transverse handle positioning slot in which the upper portion of said handle member is adapted to be positioned, and a bow-shaped compression member positioned intermediate and'with its ends engaging said cover and the upper extended end of said handle positioning member.

8. A cooker, including a vessel, a cover for said vessel, a handle member pivotally o pression member.

7 V I mounted at the upper end of said vessel and adapted to extend over said cover, a handle positioning member detachably secured to said vessel intermediate the pivotal mount ings of saidvhandle member thereon, said handle positioning member being provided at its upper end with a transverse handle positioning slot in which the upper end'of said handle member is adapted .to be positioned, a bow-shaped compression member positioned intermediate and with its ends engaging said cover and the upper extend- .ed end ofsaid handle positioning member,

and acompression' adjusting, screw means provided at one-end of sa1d bow-shaped come 9.'A'cooker, including a vessel a cover for said vessel, a handle member pivotally mounted at the upper end of said vessel and adapted to extend over said cover, a handle positioning member detachably secured to said vessel intermediate the pivotal day of May 1923.

mountings 'of said handle member thereon,

said handle positioning member beinglprm vided at'its upper end With a transverse handle positioning slot in which the upper portion of said handle member is adapted to be positioned, a screw member provided at the extended end of said handle positioning member, and va' resilient com pression member pivotally mounted at the lowerend of saidscrew member, and the other end of said compression member being adapted'to be tosaid cover.

10. A. cooker, for said vessel, a handlemember pivotally including a vessel, a cover f positioned by a lug secured If mounted at the upper end of said vessel and adapted to extend over said cover, a handle positioning member detachably-securedto said vessel intermediate the pivotalmount ings of said handle member thereon, said at its upper end With a transverse handle po-v sitioning-slot in which the upper portionof i said handle memberis adapted to be positioned, a screw member provided at the extended end 01": said handle positioning mem handle positioning member being provided" her, and a bow-shaped resilient compression member pivotally connected at its upper end with the lower end of'said screw member with aball and socket joint, and its lower end being adapted to be positioned by'a re 7 cess inthe upper middle portion of said cover; V

11.'In a pressure cooker, a container, a cover for said container, a sealing means 1n connection with said handle member and said cove r.'

In testimony whereof, I havehereunto set my handat San Diego, California, this 25th scorfr' s. GRAVES. 

